// *****************************************************************
//
//               The Compcert verified compiler
//
//           Xavier Leroy, INRIA Paris-Rocquencourt
//
// Copyright (c) 2013 Institut National de Recherche en Informatique et
//  en Automatique.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of the <organization> nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT
// HOLDER> BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// *********************************************************************

// Helper functions for 64-bit integer arithmetic.  PowerPC version.

#include "sysdeps.h"

        .text

// Conversion from unsigned long to double float	

        .balign 16
        .globl __compcert_i64_utod
__compcert_i64_utod:
        addi r1, r1, -16
        lis r5, 0x4330
        li r6, 0
        stw r5, 0(r1)
        stw r4, 4(r1)           // 0(r1) = 2^52 + (double) XL
        stw r5, 8(r1)
        stw r6, 12(r1)          // 8(r1) = 2^52
        lfd f1, 0(r1)
        lfd f2, 8(r1)
        fsub f1, f1, f2         // f1 is (double) XL
        lis r5, 0x4530
        stw r5, 0(r1)           // 0(r1) = 2^84 + (double) XH * 2^32
        stw r3, 4(r1)
        stw r5, 8(r1)           // 8(r1) = 2^84
        lfd f2, 0(r1)
        lfd f3, 8(r1)
        fsub f2, f2, f3         // f2 is XH * 2^32 as a double
        fadd f1, f1, f2         // add both to get result
        addi r1, r1, 16
        blr
        .type __compcert_i64_utod, @function
        .size __compcert_i64_utod, .-__compcert_i64_utod
	
